Samekelo Bhengu is a disgrace to customer service

I am disgusted with the treatment I received from one of the staff members Samkelo Bhengu who works for the department Credeco Financial Services at Ackerman's Plaza in phoenix, he actually clicked his tounge at me because I advised him that the tablet he wants to take use use for another customer we still busy with as the other staff member was assisting us with an application. I'm horrified of the way he addressed me and I don't appreciated by the way I was made to feel small and I am unlikely to shop at Ackerman's anymore. The staff there is lovely but this person is rude and shouldn't be working with people if he cannot address them in a humanly manner.